<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <script src="./vue.js"></script>
</head>

<body>
    <div id="app">
        <App></App>
    </div>
    <script>
        Vue.config.productionTip = false;
        // 使用extend创建子组件,相对于世界使用new,没有el,一般需要书写name

        const App = Vue.extend({
            name: "App",
            // 创建组件
            template: "<h1>App</h1>"
        })
        const vm = new Vue({
            el: "#app",
            data() {
                return {};
            },
            // 注册
            components: {
                App
            }
        });

    </script>
</body>

</html>